Bolster



E. R. VIBERG ET ALl BOLSTER Filed Jan. 9, 192e 3 sheets-sheet '1 IN VENTRS ERA/551:1?. vla ERG wAuAcEcmmfb-R ATTQRNEY 1,615,857 Feb. 1,1927.. E* R WEER@ ET AL HOLSTER Filed Jan. 9, 1926 3 Sheets-Sheet INVENTORS ERNEST R. VIBEHG `WOLMCE CPARKER Patented Feb. l, i927.

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ERNESTv R. VIBERG AND, WALLACE C. IEARKER,l OF MONTREAL, QUEBEC, CANADA.

IBOLSTER;

Application led January 9, 1926. Serial No. 80,276.

This invention relates toy new and useful improvements in holsters for railway cars and particularly to the ends thereoi'i and the object of the invention is to provide s a simple and inexpensive bolster, the ends otwhich will be so constructed that excessive wear. ot these endsdue to trictionat contact with adjacent portions ota truck will be practically eliminated.

Anotherobject to provide ia bolster the ends of which will have a much better wearing and bearing surface than bolstersbuilt in accordance with the methods at present in use.V

Up to the present time, it has been diiiicult to construct a bolster end which would resist the wear due to frictional contact with portionsot` the'truck'body` Boister ends as at present constructed have to be constantly inspected for undue wear, and when this occurs, the bolsterhas toibe dismantled for repairs,v a, very expensive item in the maintenance of rolling stock, resulting in putting the car out of commission for long a5 periods until such repairs are made.

In our invention we reduce the wearing of the ends to a minimum by making same or parts of same of metal having greater wearing qualities than malleable iron, cast steel, mild steel or such like metals which are used in the constructioin of now standard types.

In the drawings which illustrate various forms of our invention Figure l is a perspective View of one type oit' bolster which may be constructed accordino to our invention.

Figure 2 is a plan view of the device shown in Figure l.

Figure 3 is an enlarged perspective view of a bolster end.

Figure 4 is a plan view oi' a bolster end of modified construction and with double guides on each side of each end.

Figure 5 is a side elevation of the device shown in Figure 4.

Figure 6 is a sectional end view taken on the line 6-6 Figure 4.

Figure 7 is a plan view of a bolster end 5o provided with one guide on eac-h side of each end.

Figure 8 is a plan view or' the bolster end shown in Figure 7.-

Figure 9 is a partial end view of the bolster shown in Figure 7 looking in the direction of the arrow 9.

Figure l0is a plan view of abolster endin which the guides are formed in the side or rubbingplates;

Figure ll is ai side elevation. ot; the `device shown-in Figure 10.;

Referring more particularly to thewdraw,g ings, 2l designates the compression member ot a bolster, 22 the tension memberiand 23 the central strut, all ot which mayy be constructed of structural shapes and plates. Mounted onthe upper'side andin the centre of the. compressionmember is the car body supporting bearing 24. Secured to the upwardly turned ends 25, of they compression member are the saddles 26, which `form a bearing surface.: for the side bearings 217 formed by bending theends of the tension member around the ends of the compres* sion member and. securing -thenntogether Y by meansof; the rivets28. Secured to the ends ofthe tension and compression members by any suitablemeansV are the rubbing plates 29 which lit over the endsof the bolster members and may be riveted thereto by means of the rivets 30 passing through the apertures 31 Jformed in the outer Jfaces of the plates. In Figure 3 the rubbing plates are shown formed from one piece of metal bent in the form of a U, but the ends of the holsters may be modified as shown in Figures 4 to l0 inclusive. In Figures 4 to 9 inclusive, the ends are made in three sections, the two side sections being formed of plates 32 and the end section 33 of channel formation adapted to overlap one edge of each of the plates 32 and riveted thereto by means of the rivets 84. In Figure 4 two guides or lugs 35 are riveted to each side plate while in Figure 7'onlv one guide or lug is riveted to each side plate. These guides or lugs position the bolster in the car truck `(not shown). In Figure l() the lugs or guides 36 are made integral with the plates 32a. Supporting channels or spacing members 37 may be provided between the tree ends of the plates and bolts 38 may be passed through these members and the tension and compression members to provide a further means for securing the various members of the bolster together.

The above construction is practically standard practice and slight modications may be made in the various shapes of the parts to suit requirements. It is well known by car builders that the surfaces of the plates in proximity to the guides and nearest the centre of the bolster wear very rapidly through coming in frictional contact with the part of the truck (not shown), in which it is adapted to move during the running of the car. As far as we are aware these end plates have been made of malleable iron, or such like tough metal tov reduce the wear at this point to a minimum in cars at present in use, but there is still room for improvement in this part of the bolster as it still wears out rapidly, necessitating putting the car out of commission to effect the necessary repair to the badly worn plates. le overcome the above diiculty by malring these plate 29 in Figure 3 and plates 32a in Figures 4 to 10 inclusive, of a hard tempered or spring steel, heat treated to reduce their wea-r to a minimum. It has been found from actual test and from eX- periments that holsters built according` to our invention, that is having the surfaces which'come in contact with the truck made of spring steel, tend to reduce the wear at this part of the bolster to a minimum and greatly decreases the maintenance cost of cars fitted with saine. The spring steel when subjected to frictional contact with the truck tends to polish and forms a' first` class bearing surface which reduces the frictional resistance between the truck and the bolster to a minimum and also allows the car to ride more easily and with less jars than 1f such surfaces were made of softer metal than spring steel or its equivalent.

It is very simple and inexpensive to construct bolster ends with special hard steel bearing plates and greatly reduces the upkeep and necessity of repairs when compared with bolsters of the present type. The bearing plates must be made of a steel of a much harder grade than the surfaces with which they come in contact.

Having thus described our invention, what we claim is l. In bolster construction, side plates at the ends of the bolster, a plate of channel formation joining the side plates and guides formed integral with the side plates which are made of high carbon steel.

2. In bolster construction, side plates at each end of the bolster, a plate of channel formation joining the ends of the side plates, guide lugs formed in each side plate and means for attaching the side plates to the main body of the bolster, said side plates being made of steel having a high carbon content.

ln witness whereof, we have hereunto set our hands.

ERNEST R. VIBERG. WALLACE C. PARKER. 

